BlueOptics Q28-AOC-25M-QN-BO InfiniBand fibre optic cable 25m QSFP28

The BlueOptics Q28-AOC-25M-QN-BO InfiniBand fibre optic cable is a 25 metre QSFP28 to QSFP28 Active Optical Cable (AOC) designed for short-distance 100G high-speed connections within data centre racks or between adjacent racks. The cable uses OM3 multimode fibre with a 50 µm core diameter and an LSZH (low smoke, zero halogen) outer sheath. QSFP28 module ends integrate electrical-to-optical and optical-to-electrical conversion to support 100GBASE-SR4 Ethernet and InfiniBand applications while maintaining hot-pluggable compatibility with SFF and IEEE MSA-compliant ports.

Advantages

The AOC design provides lower weight, greater flexibility and a smaller bend radius compared with direct-attach twinax (DAC) solutions. Built-in I/O and O/E conversion at the QSFP28 connectors reduces the need for separate transceivers and ensures signal integrity over the 25 m link. The cable is manufactured to industry MSA standards and is factory tested for quality and functionality. LSZH sheathing reduces toxic and corrosive emissions in case of fire, supporting safer installations in confined environments.

Suitable for

• 100GBASE-SR4 Ethernet links within and between adjacent server racks
• High-performance computing and InfiniBand fabric connections
• Top-of-rack and spine switch interconnects in data centres
• Short-reach connections where reduced weight and improved flexibility are required

Key specifications

• Length: 25 m
• Connector type: QSFP28 to QSFP28 (active optical)
• Fibre type: OM3 multimode
• Core diameter: 50 µm
• Supported data rate: 100G
• Application: InfiniBand and 100GBASE-SR4 Ethernet
• Cable sheath: LSZH (low smoke, zero halogen)
• Compliance: manufactured to MSA/SFF and common industry specifications

How to use

Ensure both QSFP28 ports on the connected devices are powered down or follow hot-plug guidance from the equipment vendor, then insert the QSFP28 connector ends into the respective ports until they latch. Verify link status and negotiated speed on the host equipment. For removal, follow the vendor’s hot-plug or shutdown procedure, depress the connector latch and pull straight out to avoid stress on the fibre. Route the cable with gentle bends, respecting its minimum bend radius to avoid signal loss or mechanical damage.

Recommendations

Use the BlueOptics Q28-AOC-25M-QN-BO for short-reach 100G links where reduced weight and flexibility matter. Avoid tight bends and sharp kinks, keep fibres away from high-heat sources, and store or route cables in trays or bundles that prevent crushing. Verify device compatibility with QSFP28 AOC modules and confirm firmware/driver support for AOC modules if required by the host system.